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Finding the Fourth Proportional to 19,283.76, 28,920.60 and 8,749.44

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Solution

The fourth proportional to 19,283.76, 28,920.60 and 8,749.44 is: 13,121.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,283.76 : 28,920.60 = 8,749.44 : x
  2. Step 2: Convert to fraction form
    19,283.76/28,920.60 = 8,749.44/x
  3. Step 3: Cross multiply
    19,283.76x = 28,920.60 × 8,749.44
  4. Step 4: Simplify right side
    19,283.76x = 253,039,054.46
  5. Step 5: Solve for x
    x = 253,039,054.46/19,283.76
  6. Step 6: Final answer
    x = 13,121.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.